Interliner



`^ R. STIATTESI INTERLINER June 5, 192s. A 1,672,008

Filed Ooi. 30, 1925 Patented .une5, 1928.

PATE OFFICE RAFFAELLO s'rIATTEsI; or CASTELLO, FLORENCE, I'rALY.'

-INTERL'INER Application led October 30,` 1923, Serial N o. 671,660, andin Italy November 27, 1922.

The object of the present invention is to provide means adapted toprevent anything pointed from penetrating into the usual inner tubes ofmotor-car, motor-cycle or bicycle tyres, etc.

The invention consi-sts in the interposition between the inner tube andthe outer cover or tyre of a layer-of material such as shall spread outor slide forward in advance of any pointed object it may meet with insuch manner that although the advancement of the pointed object stilltakes place towards the inner tube, said pointed object will at the sametime encounter a flexible and extensible obstacle, the displaced part ofwhich is that which moves forward with the pointed object, preceding`the latter in such manner that it pushes up or indents the inner tube,without puncturing it. n

The material employed consists of a strip or band, or a layer of strips,in either case composed of vegetable libres, or of hair or spun threads.The strip may be smeared with powdered vegetable gum, or with any kindof powdered gum, especially such as only melts at a high temperature, orwith a mixture of said powdered gums.

The vegetable libres, the animal hair or spun threads, are preferably,woven into a stuff, of such a nature that the constituent threads areable, ifpressed upon, to slide along in the texture; this is necessarybecause if the libres, hairs or the spun threads fail to slide, theybreak under the pressure of the nail, glass, etc., met with by the tyreon its way; whereas, if they slide, they form a harmless mass in frontof the pointed object, or the cutting part, which mass sinks into theinner tube, which it neither punctures nor cuts.

The texture which answers best has been found to be a knitted web, butthe use of other textures having filaments or hairs, or slidable libres,may sulhce.

The strip having thus been formed, for the purpose ofhindering as far aspossible the advancement of the nail, it may be smeared with powderedgum, as above stated, either by rubbing the strip itself with thepowdered gumor by introducin the powder in any other way among the bres,hairs or threads -so that itmay, above all, adhere to their downysurface. In fact, the powdered gum hinders the penetration of ders theinner tube unpunctura le.

the nail, because it sticks to its point, rough- .ening it.

With several superposed layers of said simple strips, or with sucha-sare smeared and covered with an excess of gum-powder, the protectoris formed, the width of which will be greater or less according as litis intended to serve for bicycle, motor-cycle or Y automobile tyres; inany case, the protector should occupy a surface somewhat in excess ofvthat to which the tyrevis flattened on the ground under the weight ofthe vehicle.

yIt is necessary that said strip forming a v protection, should never bedirectly attached to the tyre or inner tube, because in such case itwould lose a part of its peculiar property,

which is that of spreading.

'In the accompanying drawing which shows, schematically, a practicalexample of the invention z-F igure 1 shows a sectionvof the completetyre mounted on the rim; Figure 2 the same tyre which, during running,has been partially penetrated by a nail, and Fig. 3 shows a crosssection of thefabric when it is distorted by a puncturing object.

From this example it will be seen that between the tyre -aand the tube-bis interposed a layer -04- which extends around the whole of the outerpart of the tyre, which, when distorted, is flattened against the roadsurface. The protective layer -cis formed with tapered. sides as shownat -d-. r

vThe protector formed by the strip cis simply placed between the casingand the inner tube and is retained in its central position by thepressure of the inner tube.

Figure 2 shows the functioning of a tyre provided with said internal laer which renfigure itywill be seen that whenl a pointed body, forinstance, a nail -ehappens to pierce the tyre `-ad it encounters theprotective layer -c--g this becomes distorted under the'thrust ofthepoint of the nail -e-, and, curving up, compels the inner tube to followthe distortion ofthe layer -cwithout said inner tube being in anywiseinjured. f l

The distortable layer -cdoes not rob the tyre of any of its elasticity.

Vhen the threads, the fibres or the texture employed for the protectorare ofconsiderable consistency, for instance, when the From this latteris composed of spun animal tl1readssuch as silk-the powdered gum may beomitted. e

f What' I claim and desire to secure. by

5 Letters Patent of the United States is An nterliner forprotectingvpneuinatie tyres from punctures, Consisting yof :L teX- vture of'bres formed 1n layers and arranged;

between the inner tube and the Outer eas'- ing of the tyre, the saidlayers being of such 10 a nature that .the fibres of eachv layer canslide'freely with. respect to each other, the layers being built up s0as t0 torni tapering side edges on the interliner..v

RAFFAELLO `STIMTTESI. [L 5.]

